HEAT oven to 400°F. Coat baking sheet with cooking spray. Put pineapple on pan, drizzle with syrup, sprinkle with crumbs, and coat with cooking spray. Roast 15 minutes and remove from oven. Turn on broiler, brush pineapple with any dripped-off syrup and place under broiler about 5″ from heat. Cook until charred in spots, 2 to 5 minutes. Serve warm with ice cream. Serves 4.